Answer: d.Hearth
Explanation:
In 1962, Walmart opened its first store in Rogers, Arkansas and its headquarters is located in neighboring Bentonville, Arkansas. However, this is not its highest area of concentration or its highest cluster. The highest cluster is found in the Midwest, South and Northeast, where there are about 230 Walmart locations in less that 7-mile radius.
Rogers is therefore its hearth as it is Walmart's origin.
Much of the mineral and oil wealth of the northern territories are reserved for emergency.
Geologists can determine the actual age of features on a planet by the radiometric dating method in which the age of the rocks is calculated by the natural decay of the radioactive isotopes of elements such as carbon.
In the radiometric dating method, the radioactive minerals in rocks are used. The radioactive isotopes, which are the chemical elements, naturally break down and decay to form a new isotope.
Each radioactive element has a unique decay rate which is known. Hence, the radioactive isotopes are crucial for the geologist to compare and identify the age of the rocks and furthermore, the planet.
To learn more about here isotopes here
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